Display device with integrated touch screen

ABSTRACT

Disclosed is a display device with integrated touch screen, which prevents external light from being reflected by touch electrodes without a polarizer. The display device includes an organic light emitting device layer disposed on a substrate, a plurality of color filters disposed on the organic light emitting device layer, a plurality of first touch electrodes and a plurality of second touch electrodes disposed on the plurality of color filters to overlap a boundary portion between the plurality of color filters, and a black matrix disposed on the plurality of first touch electrodes and the plurality of second touch electrodes to overlap the plurality of first touch electrodes and the plurality of second touch electrodes.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.15/711,651, filed on Sep. 21, 2017, which claims the benefit of theKorean Patent Application No. 10-2016-0178822 filed on Dec. 26, 2016,all of which are hereby incorporated by reference as if fully set forthherein.

BACKGROUND Field of the Disclosure

The present disclosure relates to a display device with integrated touchscreen.

Discussion of the Related Art

With the advancement of information-oriented society, variousrequirements for display devices for displaying an image are increasing.Therefore, various display devices such as liquid crystal display (LCD)devices, plasma display panels (PDPs), and organic light emittingdisplay devices are being used recently. In such display devices, theorganic light emitting display devices are driven with a low voltage andhave characteristics such as thinness, an excellent viewing angle, afast response speed, etc.

The organic light emitting display devices each include a plurality ofpixels, each including an organic light emitting device, and a bank thatdivides the pixels for defining the pixels. The bank may act as a pixeldefining layer. The organic light emitting device includes an anodeelectrode, a hole transporting layer, an organic light emitting layer,an electron transporting layer, and a cathode electrode. In this case,when a high-level voltage is applied to the anode electrode and alow-level voltage is applied to the cathode electrode, a hole and anelectron move to the organic light emitting layer through the holetransporting layer and the electron transporting layer and are combinedwith each other in the organic light emitting layer to emit light.

In a case where the organic light emitting device emits white light,red, green, and blue color filters for realizing red, green, and blueand a black matrix for dividing the color filters are used. The organiclight emitting device is provided on a lower substrate of the organiclight emitting display device, and the color filters and the blackmatrix are provided on an upper substrate of the organic light emittingdisplay device. Also, by using an adhesive layer, the lower substratewhere the organic light emitting device is provided is bonded to theupper substrate where the color filters and the black matrix areprovided.

A thickness of the organic light emitting display device is thickened bythe adhesive layer, and for this reason, a distance between the organiclight emitting device and the black matrix increases. For this reason,the organic light emitting display device has the following problems.

FIGS. 1A and 1B are exemplary diagrams illustrating a luminance viewingangle and occurrence of color mixture with respect to a distance betweenan organic light emitting device and a black matrix.

In FIG. 1A, when a distance between an organic light emitting layer OLof an organic light emitting device 2 and a black matrix BM is “a”,occurrence of color mixture and a luminance viewing angle (i.e.,luminance viewing angle decrease) are shown due to the organic lightemitting device 2. In FIG. 1B, when the distance between the organiclight emitting layer OL of the organic light emitting device 2 and theblack matrix BM is “b”, occurrence of color mixture and a luminanceviewing angle are not shown due to the organic light emitting device 2.The distance “a” is longer than the distance “b”. The organic lightemitting device 2 includes an anode electrode AND, an organic lightemitting layer OL, and a cathode electrode CAT.

Referring to FIGS. 1A and 1B, when the distance between the organiclight emitting layer OL of the organic light emitting device 2 and theblack matrix BM is “a”, color mixture where light emitted from theorganic light emitting device 2 of one pixel travels to a color filterCF of an adjacent pixel without being blocked by the black matrix BMoccurs. However, when the distance between the organic light emittinglayer OL of the organic light emitting device 2 and the black matrix BMis “b”, color mixture hardly occurs.

Moreover, when the distance between the organic light emitting layer OLof the organic light emitting device 2 and the black matrix BM is “a”,light emitted from the organic light emitting device 2 is output at afirst angle “θ1”, but when the distance between the organic lightemitting layer OL of the organic light emitting device 2 and the blackmatrix BM is “b”, the light emitted from the organic light emittingdevice 2 is output at a second angle “θ2” greater than the first angle“θ1”.

As described above, in order to prevent occurrence of color mixture andwiden a luminance viewing angle, it is required to decrease the distancebetween the organic light emitting layer OL of the organic lightemitting device 2 and the black matrix BM.

Recently, the organic light emitting display devices are implemented asa display device with integrated touch screen including a touch screenpanel capable of sensing a touch of a user. In this case, the organiclight emitting display devices function as a touch screen device.

In the display device with integrated touch screen, Tx electrodes and Rxelectrodes are provided in the touch screen panel. Also, the displaydevice with integrated touch screen includes a polarizer, for preventingimage quality from being degraded because light incident from theoutside is reflected by the Tx electrodes and the Rx electrodes. In thiscase, due to the polarizer, the display device with integrated touchscreen of the related art has a problem where the cost increases and athickness is thickened. Also, because external light is reflected by thepolarizer, a screen looks like a mirror in the outdoors, and for thisreason, the display device with integrated touch screen has anotherproblem where image visibility is reduced in the outdoors.

SUMMARY

Accordingly, the present disclosure is directed to provide a displaydevice with integrated touch screen that substantially obviates one ormore problems due to limitations and disadvantages of the related art.

An aspect of the present disclosure is directed to provide a displaydevice with integrated touch screen, which prevents external light frombeing reflected by touch electrodes without a polarizer.

Another aspect of the present disclosure is directed to provide adisplay device with integrated touch screen, in which a thickness isreduced despite including a color filter and a touch electrode.

Another aspect of the present disclosure is directed to provide adisplay device with integrated touch screen, in which a distance betweenan organic light emitting layer and a black matrix is reduced.

Additional advantages and features of the disclosure will be set forthin part in the description which follows and in part will becomeapparent to those having ordinary skill in the art upon examination ofthe following or may be learned from practice of the disclosure. Theobjectives and other advantages of the disclosure may be realized andattained by the structure particularly pointed out in the writtendescription and claims hereof as well as the appended drawings.

To achieve these and other advantages and in accordance with the purposeof the disclosure, as embodied and broadly described herein, there isprovided a display device with integrated touch screen, the displaydevice including an organic light emitting device layer disposed on asubstrate, a plurality of color filters disposed on the organic lightemitting device layer, a plurality of first touch electrodes and aplurality of second touch electrodes disposed on the plurality of colorfilters to overlap a boundary portion between the plurality of colorfilters, and a black matrix disposed on the plurality of first touchelectrodes and the plurality of second touch electrodes to overlap theplurality of first touch electrodes and the plurality of second touchelectrodes.

In another aspect of the present disclosure, there is provided a displaydevice with integrated touch screen, the display device including anorganic light emitting device layer disposed on a substrate, a pluralityof color filters disposed on the organic light emitting device layer andincluding a first color filter including a first color material, asecond color filter including a second color material, and a third colorfilter including a third color material, and a plurality of first touchelectrodes and a plurality of second touch electrodes disposed on theplurality of color filters to overlap a boundary portion between theplurality of color filters. Two or more of the first to third colorfilters overlap each other in a boundary portion therebetween.

It is to be understood that both the foregoing general description andthe following detailed description of the present disclosure areexemplary and explanatory and are intended to provide furtherexplanation of the disclosure as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the disclosure and are incorporated in and constitute apart of this application, illustrate embodiments of the disclosure andtogether with the description serve to explain the principle of thedisclosure. In the drawings:

FIGS. 1A and 1B are exemplary diagrams illustrating a luminance viewingangle and occurrence of color mixture with respect to a distance betweenan organic light emitting device and a black matrix;

FIG. 2 is a perspective view illustrating a display device withintegrated touch screen according to an embodiment of the presentdisclosure;

FIG. 3 is a block diagram illustrating a display device with integratedtouch screen according to an embodiment of the present disclosure;

FIG. 4 is a cross-sectional view schematically illustrating one side ofa display panel of FIG. 2;

FIG. 5 is a plan view illustrating an example of a touch sensing layerof FIG. 4;

FIG. 6 is a cross-sectional view illustrating an embodiment taken alongline I-I′ of FIG. 5;

FIG. 7 is a cross-sectional view illustrating an embodiment taken alongline II-II′ of FIG. 5;

FIG. 8 is a cross-sectional view illustrating another embodiment takenalong line I-I′ of FIG. 5;

FIG. 9 is a plan view illustrating another example of a touch sensinglayer of FIG. 4;

FIG. 10 is a cross-sectional view illustrating an embodiment taken alongline of FIG. 9; and

FIG. 11 is a cross-sectional view illustrating an embodiment taken alongline IV-IV′ of FIG. 9.

DETAILED DESCRIPTION OF THE DISCLOSURE

Reference will now be made in detail to the exemplary embodiments of thepresent disclosure, examples of which are illustrated in theaccompanying drawings. Wherever possible, the same reference numberswill be used throughout the drawings to refer to the same or like parts.

Advantages and features of the present disclosure, and implementationmethods thereof will be clarified through following embodimentsdescribed with reference to the accompanying drawings. The presentdisclosure may, however, be embodied in different forms and should notbe construed as limited to the embodiments set forth herein. Rather,these embodiments are provided so that this disclosure will be thoroughand complete, and will fully convey the scope of the present disclosureto those skilled in the art. Further, the present disclosure is onlydefined by scopes of claims.

A shape, a size, a ratio, an angle, and a number disclosed in thedrawings for describing embodiments of the present disclosure are merelyan example, and thus, the present disclosure is not limited to theillustrated details. Like reference numerals refer to like elementsthroughout. In the following description, when the detailed descriptionof the relevant known function or configuration is determined tounnecessarily obscure the important point of the present disclosure, thedetailed description will be omitted.

In a case where “comprise”, “have”, and “include” described in thepresent specification are used, another part may be added unless “only”is used. The terms of a singular form may include plural forms unlessreferred to the contrary.

In construing an element, the element is construed as including an errorrange although there is no explicit description.

In describing a position relationship, for example, when a positionrelation between two parts is described as “on”, “over”, “under”, and“next”, one or more other parts may be disposed between the two partsunless “just” or “direct” is used.

In describing a time relationship, for example, when the temporal orderis described as “after”, “subsequent”, “next”, and “before”, a casewhich is not continuous may be included unless “just” or “direct” isused.

It will be understood that, although the terms “first”, “second”, etc.may be used herein to describe various elements, these elements shouldnot be limited by these terms. These terms are only used to distinguishone element from another. For example, a first element could be termed asecond element, and, similarly, a second element could be termed a firstelement, without departing from the scope of the present disclosure.

An X axis direction, a Y axis direction, and a Z axis direction shouldnot be construed as only a geometric relationship where a relationshiptherebetween is strictly vertical, and may denote having a broaderdirectionality within a scope where elements of the present disclosureoperate functionally.

The term “at least one” should be understood as including any and allcombinations of one or more of the associated listed items. For example,the meaning of “at least one of a first item, a second item, and a thirditem” denotes the combination of all items proposed from two or more ofthe first item, the second item, and the third item as well as the firstitem, the second item, or the third item.

Features of various embodiments of the present disclosure may bepartially or overall coupled to or combined with each other, and may bevariously inter-operated with each other and driven technically as thoseskilled in the art can sufficiently understand. The embodiments of thepresent disclosure may be carried out independently from each other, ormay be carried out together in co-dependent relationship.

Hereinafter, exemplary embodiments of the present disclosure will bedescribed in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view illustrating a display device withintegrated touch screen according to an embodiment of the presentdisclosure. FIG. 3 is a block diagram illustrating a display device withintegrated touch screen according to an embodiment of the presentdisclosure.

Referring to FIGS. 2 and 3, the display device with integrated touchscreen according to an embodiment of the present disclosure may includea display panel 110, a scan driver 120, a data driver 130, a timingcontroller 160, a host system 170, a touch driver 180, and a touchcoordinate calculator 190.

The display device with integrated touch screen according to anembodiment of the present disclosure may be implemented as a flat paneldisplay device such as an LCD device, a field emission display (FED)device, a PDP, an organic light emitting display device, anelectrophoresis (EPD) device, or the like. In this disclosure below, anexample where the display device with integrated touch screen accordingto an embodiment of the present disclosure is implemented as an organiclight emitting display device will be described, but the presentembodiment is not limited thereto.

The display panel 110 may include a first substrate 111 and a secondsubstrate 112. The second substrate 112 may be an encapsulationsubstrate. The first substrate 111 may be a plastic film, a glasssubstrate, or the like. The second substrate 112 may be a plastic film,a glass substrate, an encapsulation film (a protective film), or thelike.

The display panel 110 may include a display area where a plurality ofpixels P are provided to display an image. A plurality of data lines D1to Dm (where m is a positive integer equal to or more than two) and aplurality of scan lines S1 to Sn (where n is a positive integer equal toor more than two) may be arranged in the display panel 110. The datalines D1 to Dm and the scan lines S1 to Sn may be arranged to intersecteach other. The pixels P may be respectively provided in a plurality ofpixel areas defined by an intersection structure of the data lines andthe scan lines.

Each of the pixels P of the display panel 110 may be connected to one ofthe data lines D1 to Dm and one of the scan lines S1 to Sn. Each of thepixels P of the display panel 110 may include a driving transistor whichcontrols a drain-source current according to a data voltage applied to agate electrode of the driving transistor, a scan transistor which isturned on by a scan signal of a corresponding scan line and supplies adata voltage of a corresponding data line to the gate electrode of thedriving transistor, an organic light emitting diode (OLED) which emitslight according to the drain-source current of the driving transistor,and a capacitor which stores a voltage of the gate electrode of thedriving transistor. Therefore, each of the pixels P may emit lightaccording to a current supplied to the OLED.

The scan driver 120 may receive a scan control signal GCS from thetiming controller 160. The scan driver 120 may respectively supply scansignals to the scan lines S1 to Sn according to the scan control signalGCS.

The scan driver 120 may be provided in a non-display area outside oneside or each of both sides of the display area of the display panel 110in a gate driver in panel (GIP) type. Alternatively, the scan driver 120may be manufactured as a driving chip, mounted on a flexible film, andattached on the non-display area outside the one side or each of theboth sides of the display area of the display panel 110 in a tapeautomated bonding (TAB) type.

The data driver 130 may receive digital video data DATA and a datacontrol signal DCS from the timing controller 160. The data driver 130may convert the digital video data DATA into analog positive/negativedata voltages according to the data control signal DCS and mayrespectively supply the data voltages to the data lines. That is, pixelsto which the data voltages are to be supplied may be selected by thescan signals of the scan driver 120, and the data voltages may besupplied to the selected pixels.

The data driver 130, as illustrated in FIG. 2, may include a pluralityof source drive ICs 131. Each of the plurality of source drive ICs 131may be mounted on a flexible film 140 in a chip-on film (COF) type or achip-on plastic (COP) type. The flexible film 140 may be attached onpads provided in the non-display area of the display panel 110 by usingan anisotropic conducting film, and thus, the source drive ICs 131 maybe connected to the pads.

The flexible film 140 may be provided in plurality, and a circuit board150 may be attached on the plurality of flexible films 140. A pluralityof circuits which are implemented as a plurality of driving chips may bemounted on the circuit board 150. For example, the timing controller 160may be mounted on the circuit board 150. The circuit board 150 may be aprinted circuit board (PCB) or a flexible printed circuit board (FPCB).

The timing controller 160 may receive the digital video data DATA andtiming signals from the host system 170. The timing signals may includea vertical synchronization signal, a horizontal synchronization signal,a data enable signal, a dot clock, etc. The vertical synchronizationsignal may be a signal that defines one frame period. The horizontalsynchronization signal may be a signal that defines one horizontalperiod necessary for supplying data voltages to pixels of one horizontalline of the display panel 110. The data enable signal may be a signalthat defines a period where valid data is input. The dot clock may be asignal that is repeated at a certain short period.

The timing controller 160 may generate the data control signal DCS forcontrolling an operation timing of the data driver 130 and the scancontrol signal GCS for controlling an operation timing of the scandriver 120 based on the timing signals, for the operation timing of eachof the scan driver 120 and the data driver 130. The timing controller160 may output the scan control signal GCS to the scan driver 120 andmay output the digital video data DATA and the data control signal DCSto the data driver 130.

The host system 170 may be implemented as a navigation system, a set-topbox, a DVD player, a blue-ray player, a personal computer (PC), a hometheater system, a broadcasting receiver, a phone system, or the like.The host system 170 may include a system-on chip (SoC) with a built-inscaler and may convert the digital video data DATA of an input imageinto a format suitable for displaying the image on the display panel110. The host system 170 may transmit the digital video data DATA andthe timing signals to the timing controller 160.

In addition to the data lines D1 to Dm and the scan lines S1 to Sn, aplurality of first and second touch electrodes may be provided in thedisplay panel 110. The first touch electrodes may be provided tointersect the second touch electrodes. The first touch electrodes may beconnected to a first touch driver 181 through a plurality of first touchlines T1 to Tj (where j is a positive integer equal to or more thantwo). The second touch electrodes may be connected to a second touchdriver 182 through a plurality of second touch lines R1 to Ri (where iis a positive integer equal to or more than two). A plurality of touchsensors may be respectively provided in intersection portions of thefirst touch electrodes and the second touch electrodes. In an embodimentof the present disclosure, each of the touch sensors is exemplarilyimplemented with a mutual capacitor, but is not limited thereto. Thefirst and second touch electrodes will be described later in detail withreference to FIG. 5.

The touch driver 180 may supply a driving pulse to the first touchelectrodes through the first touch line T1 to Tj and may sense chargingvariation amounts of the touch sensors through the second touch lines R1to Ri. That is, in FIG. 3, it is described that the first touch line T1to Tj are Tx lines through which the driving pulse is supplied, and thesecond touch lines R1 to Ri are Rx lines through which the chargingvariation amounts of the touch sensors are respectively sensed.

The touch driver 180 may include a first touch driver 181, a secondtouch driver 182, and a touch controller 183. The first touch driver181, the second touch driver 182, and the touch controller 183 may beintegrated into one readout integrated chip (ROIC).

The first touch driver 181 may select a first touch line, through whichthe driving pulse is to be output, according to control by the touchcontroller 183 and may supply the driving pulse to the selected firsttouch line. For example, the driving pulse may be provided in plurality,and the first touch driver 181 may sequentially supply the drivingpulses to the first touch lines T1 to Tj.

The second touch driver 182 may select second touch lines, through whichcharging variation amounts of touch sensors are to be received,according to control by the touch controller 183 and may receive thecharging variation amounts of the touch sensors through the selectedsecond touch lines. The second touch driver 182 may sample the chargingvariation amounts of the touch sensors received through the second touchlines R1 to Ri to convert the charging variation amounts into touch rawdata TRD which are digital data.

The touch controller 183 may generate a Tx setup signal for setting afirst touch line, to which the driving pulse is to be output from thefirst touch driver 181, and an Rx setup signal for setting a secondtouch line through which a touch sensor voltage is to be received fromthe second touch driver 182. Also, the touch controller 183 may generatetiming control signals for controlling the operation timings of thefirst touch driver 181 and the second touch driver 182.

The touch coordinate calculator 190 may receive the touch raw data TRDfrom the touch driver 180. The touch coordinate calculator 190 maycalculate touch coordinates, based on a touch coordinate calculationmethod and may output touch coordinate data HIDxy, including informationabout the touch coordinates, to the host system 170.

The touch coordinate calculator 190 may be implemented with a microcontroller unit (MCU). The host system 170 may analyze the touchcoordinate data HIDxy input from the touch coordinate calculator 190 toexecute an application program associated with coordinates where a touchhas been performed by a user. The host system 170 may transmit thedigital video data DATA and the timing signals to the timing controller160 according to the executed application program.

The touch driver 180 may be included in the source drive ICs 131, or maybe manufactured as a separate driving chip and mounted on the circuitboard 150. Also, the touch coordinate calculator 190 may be manufacturedas a separate driving chip and mounted on the circuit board 150.

FIG. 4 is a cross-sectional view schematically illustrating one side ofthe display panel 110 of FIG. 2.

Referring to FIG. 4, the display panel 110 may include a first substrate111, a second substrate 112, and a thin film transistor (TFT) layer 10,an organic light emitting device layer 20, an encapsulation layer 30, acolor filter layer 40, and a touch sensing layer 50 disposed between thefirst and second substrates 111 and 112.

The first substrate 111 may be a plastic film, a glass substrate, or thelike.

The TFT layer 10 may be formed on the first substrate 111. The TFT layer10 may include the scan lines, the data lines, and a plurality of TFTs.The TFTs may each include a gate electrode, a semiconductor layer, asource electrode, and a drain electrode. In case where the scan driveris provided in the GIP type, the scan driver may be provided along withthe TFT layers 10.

The organic light emitting device layer 20 may be formed on the TFTlayer 10. The organic light emitting device layer 20 may include a firstelectrode, an organic light emitting layer, a second electrode, and abank. The organic light emitting layer may include a hole transportinglayer, a light emitting layer, and an electron transporting layer. Inthis case, when a voltage is applied to the first electrode and thesecond electrode, a hole and an electron move to the light emittinglayer through the hole transporting layer and the electron transportinglayer and are combined with each other in the light emitting layer toemit light. Since the pixels are provided in an area where the organiclight emitting device layer 20 is formed, the area where the organiclight emitting device layer 20 is formed may be defined as a displayarea. A peripheral area of the display area may be defined as anon-display area.

The encapsulation layer 30 may be formed on the organic light emittingdevice layer 20. The encapsulation layer 30 prevents oxygen or waterfrom penetrating into the organic light emitting device layer 20. Theencapsulation layer 30 may include at least one inorganic layer.

The color filter layer 40 may be formed on the encapsulation layer 30.The color filter layer 40 may include a plurality of color filtershaving different transmissive wavelength ranges. In this case, theplurality of color filters may be arranged to respectively correspond toa plurality of pixels provided in the organic light emitting devicelayer 20.

The touch sensing layer 50 may be formed on the color filter layer 40.The touch sensing layer 50 may include first and second touch electrodesfor sensing a user touch. Also, the touch sensing layer 50 may furtherinclude a black matrix disposed on the first and second touchelectrodes, for preventing light incident from the outside from beingreflected by the first and second touch electrodes. A plane structure ofthe touch sensing layer 50 will be described below with reference toFIG. 5. Also, a cross-sectional structure of the touch sensing layer 50will be described below in detail with reference to FIGS. 6 and 7.

The second substrate 112 may be provided on the touch sensing layer 50.The second substrate 112 may act as a cover substrate or a cover windowwhich covers the first substrate 111. The second substrate 112 may be aplastic film, a glass substrate, an encapsulation film (a protectivefilm), or the like, but is not limited thereto. In other embodiments,the second substrate 112 may be an optical film such as an OLEDtransmittance controllable film (OTF).

FIG. 5 is a plan view illustrating an example of the touch sensing layer50 of FIG. 4.

Referring to FIG. 5, the touch sensing layer 50 may include a pluralityof first touch electrodes TE and a plurality of second touch electrodesRE. The first touch electrodes TE may extend in a first direction (anX-axis direction) and may have a line shape, and the second touchelectrodes RE may extend in a second direction (a Y-axis direction) andmay have a line shape. The first direction (the X-axis direction) may bea direction parallel to the scan lines S1 to Sn, and the seconddirection (the Y-axis direction) may be a direction parallel to the datalines D1 to Dm. Alternatively, the first direction (the X-axisdirection) may be a direction parallel to the data lines D1 to Dm, andthe second direction (the Y-axis direction) may be a direction parallelto the scan lines S1 to Sn.

An insulation layer may be disposed between the first touch electrodesTE and the second touch electrodes RE to electrically insulate the firsttouch electrodes TE from the second touch electrodes RE. Also, each offirst touch electrodes TE extending in the first direction may beelectrically insulated from first touch electrodes TE adjacent theretoin the second direction. Each of second touch electrodes RE extending inthe second direction may be electrically insulated from second touchelectrodes RE adjacent thereto in the first direction.

Therefore, a mutual capacitor corresponding to a touch sensor may beprovided in an intersection area of the first touch electrode TE and thesecond touch electrode RE.

The first touch electrodes TE extending in the first direction may beconnected to a first touch line TL at one end thereof. The first touchline TL may be connected to the first touch driver 181 through a pad.Therefore, the first touch electrodes TE may receive the driving pulsefrom the first touch driver 181 through the first touch line TL.

The second touch electrodes RE extending in the second direction may beconnected to a second touch line RL at one end thereof. The second touchline RL may be connected to the second touch driver 182 through the pad.Therefore, the second touch driver 182 may receive charging variationamounts of touch sensors from the second touch electrodes RE.

First Embodiment

FIG. 6 is a cross-sectional view illustrating an embodiment taken alongline I-I′ of FIG. 5, and FIG. 7 is a cross-sectional view illustratingan embodiment taken along line II-II′ of FIG. 5.

Referring to FIGS. 6 and 7, a TFT layer 10 may be formed on a firstsubstrate 111. The TFT layer 10 may include a plurality of TFTs 210, agate insulation layer 220, an interlayer insulation layer 230, apassivation layer 240, and a planarization layer 250.

A buffer layer may be formed on one surface of the first substrate 111.The buffer layer may be formed on the one surface of the first substrate111, for protecting the TFTs 210 and a plurality of organic lightemitting devices 260 from water penetrating through the first substrate111 vulnerable to penetration of water. The one surface of the firstsubstrate 111 may be a surface facing the second substrate 112. Thebuffer layer may be formed of a plurality of inorganic layers which arealternately stacked. For example, the buffer layer may be formed of amultilayer where one or more inorganic layers of silicon oxide (SiOx),silicon nitride (SiNx), and SiON are alternately stacked. The bufferlayer may be omitted.

The TFTs 210 may be formed on the buffer layer. The TFTs 210 may eachinclude an active layer 211, a gate electrode 212, a source electrode214, and a drain electrode 215. In FIG. 6, the TFTs 210 are exemplarilyillustrated as being formed in a top gate type where the gate electrode212 is disposed on the active layer 211, but is not limited thereto.That is, the TFTs 210 may be formed in a bottom gate type where the gateelectrode 212 is disposed under the active layer 211 or a double gatetype where the gate electrode 212 is disposed both on and under theactive layer 211.

The active layer 211 may be formed on the buffer layer. The active layer211 may be formed of a silicon-based semiconductor material, anoxide-based semiconductor material, and/or the like. A light blockinglayer (not shown) for blocking external light incident on the activelayer 211 may be formed between the buffer layer and the active layer211.

The gate insulation layer 220 may be formed on the active layer 211. Thegate insulation layer 220 may be formed of an inorganic layer, and forexample, may be formed of silicon oxide (SiOx), silicon nitride (SiNx),or a multilayer thereof.

The gate electrode 212 and a gate line may be formed on the gateinsulation layer 220. The gate electrode 212 and the gate line may eachbe formed of a single layer or a multilayer which includes one ofmolybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti),nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof.

The interlayer insulation layer 230 may be formed on the gate electrode212 and the gate line. The interlayer insulation layer 230 may be formedof an inorganic layer, and for example, may be formed of SiOx, SiNx, ora multilayer thereof.

The source electrode 214, the drain electrode 215, and a data line maybe formed on the interlayer insulation layer 230. Each of the sourceelectrode 214 and the drain electrode 215 may contact the active layer211 through a contact hole which passes through the gate insulationlayer 220 and the interlayer insulation layer 230. The source electrode214, the drain electrode 215, and the data line may each be formed of asingle layer or a multilayer which includes one of Mo, Al, Cr, Au, Ti,Ni, Nd, and Cu, or an alloy thereof.

The passivation layer 240 for insulating the TFT 210 may be formed onthe source electrode 214, the drain electrode 215, and the data line.The passivation layer 240 may be formed of an inorganic layer, and forexample, may be formed of SiOx, SiNx, or a multilayer thereof.

The planarization layer 250 for planarizing a step height caused by theTFT 210 may be formed on the passivation layer 240. The planarizationlayer 250 may be formed of an organic layer such as acryl resin, epoxyresin, phenolic resin, polyamide resin, polyimide resin, and/or thelike.

The organic light emitting device layer 20 may be formed on the TFTlayer 10. The organic light emitting device layer 20 may include theorganic light emitting devices 260 and a bank 270.

The organic light emitting devices 260 and the bank 270 may be formed onthe planarization layer 250. The organic light emitting devices 260 mayeach include a first electrode 261, an organic light emitting layer 262,and a second electrode 263. The first electrode 261 may be an anodeelectrode, and the second electrode 263 may be a cathode electrode.

The first electrode 261 may be formed on the planarization layer 250.The first electrode 261 may be connected to the source electrode 214 ofthe TFT 210 through a contact hole which passes through the passivationlayer 240 and the planarization layer 250. The first electrode 261 maybe formed of a metal material, which is high in reflectivity, such as astacked structure (Ti/Al/Ti) of Al and Ti, a stacked structure(ITO/Al/ITO) of Al and ITO, an APC alloy, or a stacked structure(ITO/APC/ITO) of an APC alloy and ITO. The APC alloy may be an alloy ofAg, palladium (Pd), and Cu.

The bank 270 may be formed on the planarization layer 250 to cover anedge of the first electrode 261, for dividing a plurality of pixels P1to P3. That is, the bank 270 may act as a pixel defining layer thatdefines the pixels P1 to P3.

Each of the pixels P1 to P3 may denote an area where a first electrodecorresponding to an anode electrode, an organic light emitting layer,and a second electrode corresponding to a cathode electrode aresequentially stacked, and a hole from the first electrode and anelectron from the second electrode are combined with each other in theorganic light emitting layer to emit light. In this case, a first pixelP1 may be defined as a red subpixel, a second pixel P2 may be defined asa green subpixel, and a third pixel P3 may be defined as a bluesubpixel. Also, the first to third pixels P1 to P3 may be defined as oneunit pixel. However, an embodiment of the present disclosure is notlimited thereto, and a white subpixel may be additionally defined.

The bank 270 may be formed of an organic layer such as acryl resin,epoxy resin, phenolic resin, polyamide resin, polyimide resin, and/orthe like.

The bank 270 may be a black bank. The black bank may be formed of alight absorbing material or may be doped with a light absorbing agent,thereby absorbing light incident from the outside. The black bank may bedisposed to overlap a black matrix BM to be described below. In thiscase, the black bank may have a width which is equal to or greater thanthat of the black matrix BM, and may absorb light which flows in withoutbeing absorbed by the black matrix BM. The black bank may be formed of ablack-based material, and for example, may include a carbon-based blackpigment.

The organic light emitting layer 262 may be formed on the firstelectrode 261 and the bank 270. The organic light emitting layer 262 maybe a common layer which is formed in the pixels P1 to P3 in common, andmay be a white light emitting layer which emits white light. In thiscase, the organic light emitting layer 262 may be formed in a tandemstructure including two or more stacks. Each of the stacks may include ahole transporting layer, at least one light emitting layer, and anelectron transporting layer.

In FIGS. 6 and 7, the organic light emitting layer 262 is illustrated asa common layer which is formed in the pixels P1 to P3 in common, but isnot limited thereto. In another embodiment, the organic light emittinglayer 262 may include a red light emitting layer emitting red light, agreen light emitting layer emitting green light, and a blue lightemitting layer emitting blue light. The red light emitting layer may beformed on the first electrode 261 of the first pixel P1. The green lightemitting layer may be formed on the first electrode 261 of the secondpixel P2. The blue light emitting layer may be formed on the firstelectrode 261 of the third pixel P3. In this case, each of the red lightemitting layer, the green light emitting layer, and the blue lightemitting layer may be deposited by using a fine metal mask (FMM).

The second electrode 263 may be formed on the organic light emittinglayer 262. The second electrode 263 may be formed to cover the organiclight emitting layer 262. The second electrode 263 may be a common layerwhich is formed in a plurality of pixels such as red subpixel, greensubpixel, blue subpixel and white subpixel in common.

The second electrode 263 may be formed of a transparent conductivematerial (or TCO), such as indium tin oxide (ITO) or indium zinc oxide(IZO) capable of transmitting light, or a semi-transmissive conductivematerial such as Mg, Ag, or an alloy of Mg and Ag. If the secondelectrode 263 is formed of a semi-transmissive conductive material,emission efficiency is enhanced by a micro-cavity. A capping layer maybe formed on the second electrode 263.

The encapsulation layer 30 may be formed on the organic light emittingdevice layer 20. The encapsulation layer 30 may include an encapsulationfilm 280.

In detail, the encapsulation film 280 may be disposed on the secondelectrode 263. The encapsulation film 280 prevents oxygen or water frompenetrating into the organic light emitting layer 262 and the secondelectrode 263. To this end, the encapsulation film 280 may include atleast one inorganic film and at least one organic film. For example, theencapsulation film 280 may include a first inorganic film 281, anorganic film 282, and a second inorganic film 283.

The first inorganic film 281 may be disposed on the second electrode263. The first inorganic film 281 may be formed to cover the secondelectrode 263. The organic film 282 may be disposed on the firstinorganic film 281. The organic film 282 may be formed to a sufficientthickness, for preventing particles from penetrating into the organiclight emitting layer 262 and the second electrode 263 via the firstinorganic film 281. The organic film 282 may be blocked by a dam (notshown) so as not to cover a pad. The second inorganic film 283 may bedisposed on the organic film 282. The second inorganic film 283 may beformed to cover the organic film 282.

Each of the first and second inorganic films 281 and 283 may be formedof silicon nitride, aluminum nitride, zirconium nitride, titaniumnitride, hafnium nitride, tantalum nitride, silicon oxide, aluminumoxide, titanium oxide, and/or the like. The organic film 282 may beformed of acryl resin, epoxy resin, phenolic resin, polyamide resin,polyimide resin, and/or the like.

A color filter layer 40 may be formed on the encapsulation layer 30. Thecolor filter layer 40 may include first to third color filters CF1 toCF3 including different color materials from each other and an overcoatlayer 290.

In detail, the first to third color filters CF1 to CF3 having differenttransmissive wavelength ranges may be disposed on the encapsulation film280. The first color filter CF1 may be a red color filter disposed incorrespondence with the first pixel P1, the second color filter CF2 maybe a green color filter disposed in correspondence with the second pixelP2, and the third color filter CF3 may be a blue color filter disposedin correspondence with the third pixel P3. In this case, the first colorfilter CF1 may be formed of an organic layer including a red pigment,the second color filter CF2 may be formed of an organic layer includinga green pigment, and the third color filter CF3 may be formed of anorganic layer including a blue pigment.

Although not shown, the color filter layer 40 may further include atransparent organic layer disposed in correspondence with a whitesubpixel. In this case, the transparent organic layer may be formed ofacryl resin, epoxy resin, phenolic resin, polyamide resin, polyimideresin, and/or the like.

The overcoat layer 290 may be formed on the first to third color filtersCF1 to CF3. The overcoat layer 290 may be disposed on the first to thirdcolor filters CF1 to CF3 to planarize a step height between the first tothird color filters CF1 to CF3.

The touch sensing layer 50 may be formed on the color filter layer 40.The touch sensing layer 50 may include a plurality of first touchelectrodes TE, a plurality of second touch electrodes RE, a black matrixBM, a first insulation layer INS1, a second insulation layer INS2, and athird insulation layer INS3.

The first touch electrodes TE may be directly formed on a top of thecolor filter layer 40. The first touch electrodes TE may be arranged tooverlap a boundary portion between the first to third color filters CF1to CF3 in the first direction (the X-axis direction). The first touchelectrodes TE may be formed of a transparent metal material such as ITO,IZO, or the like, or may be formed of a metal material such as Al, AlNd,Mo, MoTi, Cu, Cr, Ag, or an Ag-based alloy.

The first insulation layer INS1 may be formed to cover the first touchelectrodes TE. In this case, the first insulation layer INS1 may bedisposed between the first touch electrodes TE. The first touchelectrodes TE may be insulated from each other by the first insulationlayer INS1. Also, the first insulation layer INS1 may be disposed on thefirst touch electrodes TE. The first insulation layer INS1 may be formedof an inorganic layer, and for example, may be formed of SiOx, SiNx, ora multilayer thereof.

The second touch electrodes RE may be formed on the first insulationlayer INS1. The second touch electrodes RE may be arranged to overlapthe boundary portion between the first to third color filters CF1 to CF3in the second direction (the Y-axis direction). Also, the second touchelectrodes RE may be insulated from the first touch electrodes TE by thefirst insulation layer INS1. The second touch electrodes RE may beformed of a transparent metal material such as ITO, IZO, or the like, ormay be formed of a metal material such as Al, AlNd, Mo, MoTi, Cu, Cr,Ag, or an Ag-based alloy.

The second insulation layer INS2 may be formed to cover the second touchelectrodes RE. In this case, the second insulation layer INS2 may bedisposed between the second touch electrodes RE. The second touchelectrodes RE may be insulated from each other by the second insulationlayer INS2. Also, the second insulation layer INS2 may be disposed onthe second touch electrodes RE. The second insulation layer INS2 may beformed of an inorganic layer, and for example, may be formed of SiOx,SiNx, or a multilayer thereof. In FIGS. 6 and 7, the second insulationlayer INS2 is illustrated, but the second insulation layer INS2 may beomitted.

The first touch line TL may extend from the first touch electrode TE,and the second touch line RL may extend from the second touch electrodeRE. Each of the first and second touch lines TL and RL may extend to anon-display area and may be connected to a pad in the non-display area.

The black matrix BM may be formed on the second insulation layer INS2.The black matrix BM may be disposed to overlap the first touchelectrodes TE in the first direction (the X-axis direction). Also, theblack matrix BM may be disposed to overlap the second touch electrodesRE in the second direction (the Y-axis direction). In this manner, theblack matrix BM may be disposed to overlap the first and second touchelectrodes TE and RE, thereby preventing light incident from the outsidefrom being reflected by the first and second touch electrodes TE and RE.Also, the black matrix BM may be disposed to overlap the boundaryportion between the first to third color filters CF1 to CF3, therebypreventing color mixture from occurring in adjacent pixels.

The black matrix BM may be formed of an organic layer including acarbon-based black pigment. Alternatively, the black matrix BM may beformed of an opaque metal material such as chromium (Cr), molybdenum(Mo), an alloy (MoTi) of Mo and Ti, tungsten (W), vanadium (V), niobium(Nb), tantalum (Ta), manganese (Mn), cobalt (Co), nickel (Ni), or thelike which is high in a light absorption rate.

-   The third insulation layer INS3 may be formed to cover the black    matrix BM. In this case, the third insulation layer INS3 may be    formed of an inorganic layer, and for example, may be formed of    SiOx, SiNx, or a multilayer thereof. In FIG. 6, the third insulation    layer INS3 is illustrated, but the third insulation layer INS3 may    be omitted.

According to the embodiments of the present disclosure, since the colorfilter layer 40 may be directly formed on the encapsulation layer 30 andthe touch sensing layer 50 may be directly formed on the color filterlayer 40, alignment is not needed in bonding the first substrate 111 tothe second substrate 112, and a separate adhesive layer is not needed.Accordingly, according to the embodiments of the present disclosure, athickness of a device is reduced.

Moreover, according to the embodiments of the present disclosure, sincethe color filter layer 40 instead of the touch sensing layer 50 is firstformed on the encapsulation layer 30, a distance between the organiclight emitting layer 262 and each of the first to third color filtersCF1 to CF3 is reduced. Accordingly, according to the embodiments of thepresent disclosure, a luminance viewing angle and a color viewing angleare improved.

Moreover, according to the embodiments of the present disclosure, sincethe black matrix BM is disposed on the first and second touch electrodesTE and RE, the black matrix BM prevents light, which is incident fromthe outside, from being reflected by the first and second touchelectrodes TE and RE. Accordingly, according to the embodiments of thepresent disclosure, reflection of external light is blocked even withoutincluding a separate polarizer, thereby reducing the manufacturing costand decreasing a thickness of a device.

Moreover, according to the embodiments of the present disclosure, sincethe touch sensing layer 50 is disposed on the color filter layer 40,distances between the first and second touch electrodes TE and RE of thetouch sensing layer 50 and the first and second electrodes 261 and 263of the organic light emitting device layer 20 are secured. Accordingly,according to the embodiments of the present disclosure, noise caused byparasitic capacitors between the first and second touch electrodes TEand RE of the touch sensing layer 50 and the first and second electrodes261 and 263 of the organic light emitting device layer 20 is reduced.

Second Embodiment

FIG. 8 is a cross-sectional view illustrating another embodiment takenalong line I-I′ of FIG. 5.

Except that first to third color filters CF1 to CF3 overlap each otherin a boundary portion therebetween, a display device with integratedtouch screen illustrated in FIG. 8 is substantially the same as thedetails described above with reference to FIGS. 6 and 7. Therefore,detailed descriptions on the first substrate 111, the second substrate112, the TFT layer 10, the organic light emitting device layer 20, theencapsulation layer 30, and the touch sensing layer 50 illustrated inFIGS. 6 and 7 are omitted.

A color filter layer 40 may be formed on the encapsulation layer 30. Thecolor filter layer 40 may include first to third color filters CF1 toCF3 and an overcoat layer 290.

In detail, the first to third color filters CF1 to CF3 having differenttransmissive wavelength ranges may be disposed on the encapsulation film280. The first color filter CF1 may be a red color filter disposed incorrespondence with a first pixel P1, the second color filter CF2 may bea green color filter disposed in correspondence with a second pixel P2,and the third color filter CF3 may be a blue color filter disposed incorrespondence with a third pixel P3. In this case, the first colorfilter CF1 may be formed of an organic layer including a red pigment,the second color filter CF2 may be formed of an organic layer includinga green pigment, and the third color filter CF3 may be formed of anorganic layer including a blue pigment.

The first to third color filters CF1 to CF3 may be disposed to overlapeach other in an area (i.e., a boundary portion) overlapping a bank 270.As illustrated in FIG. 8, the first to third color filters CF1 to CF3may be sequentially stacked on a boundary portion between first to thirdcolor filters CF1 to CF3. In this case, the stacking order of the firstto third color filters CF1 to CF3 stacked on the boundary portion may berelevant to an order in which the first to third color filters CF1 toCF3 are formed. For example, if the color filter layer 40 is formed inthe order of the first color filter CF1, the second color filter CF2,and the third color filter CF3, the first to third color filters CF1 toCF3 may be formed to overlap each other in the boundary portion betweenthe first to third color filters CF1 to CF3 in the order of the firstcolor filter CF1, the second color filter CF2, and the third colorfilter CF3.

In FIG. 8, it is illustrated that all of the first to third colorfilters CF1 to CF3 overlap each other in the boundary portion betweenthe first to third color filters CF1 to CF3, but the present embodimentis not limited thereto. In other embodiments, two adjacent color filtersmay overlap each other in the boundary portion between the first tothird color filters CF1 to CF3. For example, the first color filter CF1and the second color filter CF2 may be formed to overlap each other in aboundary portion between the first color filter CF1 and the second colorfilter CF2, and the third color filter CF3 may not overlap.

As described above, two or more of the first to third color filters CF1to CF3 may be disposed to overlap each other in the boundary portionbetween the first to third color filters CF1 to CF3, thereby effectivelypreventing color mixture which occurs when light emitted from one pixeltravels to a color filter of an adjacent pixel.

To provide description for example, if the first color filter CF1transmitting red light and the second color filter CF2 transmittinggreen light overlap each other in the boundary portion between the firstcolor filter CF1 and the second color filter CF2, the red light passingthrough the first color filter CF1 cannot pass through the second colorfilter CF2. Accordingly, light emitted from the first pixel P1 cannottravel to the second pixel P2, and thus, light emitted from the secondpixel P2 cannot travel to the first pixel P1.

Although not shown, the color filter layer 40 may further include atransparent organic layer disposed in correspondence with a whitesubpixel. In this case, the transparent organic layer may be formed ofacryl resin, epoxy resin, phenolic resin, polyamide resin, polyimideresin, and/or the like.

An overcoat layer 290 may be formed on the first to third color filtersCF1 to CF3. The overcoat layer 290 may be disposed on the first to thirdcolor filters CF1 to CF3 to planarize a step height between the first tothird color filters CF1 to CF3.

According to the present embodiment, two or more of the first to thirdcolor filters CF1 to CF3 may be disposed to overlap each other in theboundary portion between the first to third color filters CF1 to CF3,thereby effectively preventing color mixture which occurs when lightemitted from one pixel travels to a color filter of an adjacent pixel.

Moreover, according to the embodiments of the present disclosure, two ormore of the first to third color filters CF1 to CF3 are merely formed tooverlap each other without forming a separate pattern for preventingcolor mixture in the boundary portion between the first to third colorfilters, but it is expected to prevent occurrence of color mixture.Accordingly, according to the embodiments of the present disclosure, itis not required to add a separate manufacturing process.

Third Embodiment

FIG. 9 is a plan view illustrating another example of the touch sensinglayer 50 of FIG. 4. FIG. 10 is a cross-sectional view illustrating anembodiment taken along line of FIG. 9; and FIG. 11 is a cross-sectionalview illustrating an embodiment taken along line IV-IV′ of FIG. 9.

Referring to FIG. 9, the touch sensing layer 50 may include a pluralityof first touch electrodes TE, a plurality of second touch electrodes RE,and a bridge electrode BE. The first touch electrodes TE may be arrangedin a first direction (an X-axis direction) and connected to each other,and the second touch electrodes RE may be arranged in a second direction(a Y-axis direction) and connected to each other. The first direction(the X-axis direction) may be a direction parallel to the scan lines S1to Sn, and the second direction (the Y-axis direction) may be adirection parallel to the data lines D1 to Dm. Alternatively, the firstdirection (the X-axis direction) may be a direction parallel to the datalines D1 to Dm, and the second direction (the Y-axis direction) may be adirection parallel to the scan lines S1 to Sn.

In order to prevent the first touch electrodes TE and the second touchelectrodes RE from being short-circuited in intersection areastherebetween, the first touch electrodes TE which are adjacent to eachother in the first direction may be electrically connected to each otherthrough the bridge electrodes BE. The bridge electrodes BE may bedisposed on a layer different from a layer on which the first and secondtouch electrodes TE and RE are disposed, and may be connected to,through contact portions CT, the first touch electrodes TE adjacent toeach other. The bridge electrodes BE may intersect the second touchelectrodes RE.

Each of first touch electrodes TE connected to each other in the firstdirection may be electrically insulated from first touch electrodes TEadjacent thereto in the second direction. Each of second touchelectrodes RE connected to each other in the second direction may beelectrically insulated from second touch electrodes RE adjacent theretoin the first direction.

Therefore, a mutual capacitor corresponding to a touch sensor may beprovided in an intersection area of the first touch electrode TE and thesecond touch electrode RE.

The first touch electrodes TE connected to each other in the firstdirection may be connected to a first touch line TL at one end thereof.The first touch line TL may be connected to the first touch driver 181through a pad. Therefore, the first touch electrodes TE may receive thedriving pulse from the first touch driver 181 through the first touchline TL.

The second touch electrodes RE connected to each other in the seconddirection may be connected to a second touch line RL at one end thereof.The second touch line RL may be connected to the second touch driver 182through the pad. Therefore, the second touch driver 182 may receivecharging variation amounts of touch sensors of the second touchelectrodes RE.

Except that the first touch electrodes TE are connected to each otherthrough the bridge electrode BE, a display device with integrated touchscreen illustrated in FIGS. 10 and 11 is substantially the same as thedetails described above with reference to FIGS. 6 and 7. Therefore,detailed descriptions on the first substrate 111, the second substrate112, the TFT layer 10, the organic light emitting device layer 20, theencapsulation layer 30, and the color filter layer 40 illustrated inFIGS. 6 and 7 are omitted.

The touch sensing layer 50 may be formed on the color filter layer 40.The touch sensing layer 50 may include a plurality of first touchelectrodes TE, a plurality of second touch electrodes RE, a plurality ofbridge electrodes BE, a black matrix BM, a first insulation layer INS1,and a third insulation layer INS3.

The first touch electrodes TE and the second touch electrodes RE may bedirectly formed on a top of the color filter layer 40. The first touchelectrodes TE may be arranged to overlap a boundary portion betweenfirst to third color filters CF1 to CF3 in the first direction (theX-axis direction). The second touch electrodes RE may be arranged tooverlap the boundary portion between the first to third color filtersCF1 to CF3 in the second direction (the Y-axis direction). The firsttouch electrodes TE and the second touch electrodes RE may each beformed of a transparent metal material such as ITO, IZO, or the like, ormay be formed of a metal material such as Al, AlNd, Mo, MoTi, Cu, Cr,Ag, or an Ag-based alloy.

The first touch electrodes TE, the second touch electrodes RE, the firsttouch lines TL, and the second touch lines RL may be disposed on thesame layer. The first insulation layer INS1 may be disposed to cover thefirst touch electrodes TE, the second touch electrodes RE, the firsttouch lines TL, and the second touch lines RL. In this case, the firstinsulation layer INS1 may be disposed between each of the first touchelectrodes TE and each of the second touch electrodes RE. Each of thefirst touch electrodes TE may be insulated from each of the second touchelectrodes RE by the first insulation layer INS1. Also, the firstinsulation layer INS1 may be disposed on the first touch electrodes TEand the second touch electrodes RE. The second touch electrodes RE maybe insulated from the bridge electrodes BE by the first insulation layerINS1. The first insulation layer INS1 may be formed of an inorganiclayer, and for example, may be formed of SiOx, SiNx, or a multilayerthereof.

The first touch line TL may extend from the first touch electrode TE,and the second touch line RL may extend from the second touch electrodeRE. Each of the first and second touch lines TL and RL may extend to anon-display area and may be connected to a pad in the non-display area.

The bridge electrodes BE may be connected to adjacent first touchelectrodes TE through contact portions CT, respectively. The bridgeelectrode BE may intersect the second touch electrode RE. In this case,the contact portions CT may be formed to pass through the firstinsulation layer INS1.

The black matrix BM may be formed on the first insulation layer INS1 andthe bridge electrodes BE. The black matrix BM may be disposed to overlapthe first touch electrodes TE and the bridge electrodes BE in the firstdirection (the X-axis direction). Also, the black matrix BM may bedisposed to overlap the second touch electrodes RE in the seconddirection (the Y-axis direction). In this manner, the black matrix BMmay be disposed to overlap the first and second touch electrodes TE andRE and the bridge electrodes BE, thereby preventing light incident fromthe outside from being reflected by the first and second touchelectrodes TE and RE and the bridge electrodes BE. Also, the blackmatrix BM may be disposed to overlap the boundary portion between thefirst to third color filters CF1 to CF3, thereby preventing colormixture from occurring in adjacent pixels.

The black matrix BM may be formed of an organic layer including acarbon-based black pigment. Alternatively, the black matrix BM may beformed of an opaque metal material such as chromium (Cr), molybdenum(Mo), an alloy (MoTi) of Mo and Ti, tungsten (W), vanadium (V), niobium(Nb), tantalum (Ta), manganese (Mn), cobalt (Co), nickel (Ni), or thelike which is high in a light absorption rate.

The third insulation layer INS3 may be formed to cover the black matrixBM. In this case, the third insulation layer INS3 may be formed of aninorganic layer, and for example, may be formed of SiOx, SiNx, or amultilayer thereof. In FIG. 10, the third insulation layer INS3 isillustrated, but the third insulation layer INS3 may be omitted.

According to the present embodiment, the first and second touchelectrodes TE and RE may be formed on the same layer, thereby reducing athickness of the touch sensing layer 50.

According to the embodiments of the present disclosure, since the colorfilter layer may be directly formed on the encapsulation layer and thetouch sensing layer may be directly formed on the color filter layer,alignment is not needed in bonding the first substrate to the secondsubstrate, and a separate adhesive layer is not needed. Accordingly,according to the embodiments of the present disclosure, a thickness of adevice is reduced.

Moreover, according to the embodiments of the present disclosure, sincethe color filter layer instead of the touch sensing layer is firstformed on the encapsulation layer, a distance between the organic lightemitting layer and each of the color filters is reduced. Accordingly,according to the embodiments of the present disclosure, a luminanceviewing angle and a color viewing angle are improved.

Moreover, according to the embodiments of the present disclosure, sincethe black matrix is disposed on the first and second touch electrodes,the black matrix prevents light, which is incident from the outside,from being reflected by the first and second touch electrodes.Accordingly, according to the embodiments of the present disclosure,reflection of external light is blocked even without including aseparate polarizer, thereby reducing the manufacturing cost anddecreasing a thickness of a device.

Moreover, according to the embodiments of the present disclosure, sincethe touch sensing layer is disposed on the color filter layer, distancesbetween the first and second touch electrodes of the touch sensing layerand the first and second electrodes of the organic light emitting devicelayer are secured. Accordingly, according to the embodiments of thepresent disclosure, noise caused by parasitic capacitors between thefirst and second touch electrodes of the touch sensing layer and thefirst and second electrodes of the organic light emitting device layeris reduced.

Moreover, according to the embodiments of the present disclosure, two ormore color filters may be disposed to overlap each other in a boundaryportion between the first to third color filters, thereby effectivelypreventing color mixture which occurs when light emitted from one pixeltravels to a color filter of an adjacent pixel.

Moreover, according to the embodiments of the present disclosure, two ormore of the first to third color filters are merely formed to overlapeach other without forming a separate pattern for preventing colormixture in the boundary portion between the first to third colorfilters, but it is expected to prevent occurrence of color mixture.Accordingly, according to the embodiments of the present disclosure, itis not required to add a separate manufacturing process.

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the present disclosurewithout departing from the spirit or scope of the disclosures. Thus, itis intended that the present disclosure covers the modifications andvariations of this disclosure provided they come within the scope of theappended claims and their equivalents.

What is claimed is:
 1. A display device comprising: a light emittingdevice layer on a substrate; an encapsulation layer on the lightemitting device layer, the encapsulation layer including at least oneinorganic film; a plurality of color filters on the encapsulation layer;a plurality of first touch electrodes and a plurality of second touchelectrodes on the plurality of the color filters, the plurality of thefirst touch electrodes and the plurality of the second touch electrodesoverlapping a boundary portion between the plurality of the colorfilters; a first touch line provided on the substrate and connected toone end of the first touch electrodes extending in a first direction; apad provided on the substrate; a first touch driver connected with thefirst touch line through the pad; and a black matrix on the plurality ofthe first touch electrodes and the plurality of the second touchelectrodes, the black matrix overlapping the plurality of the firsttouch electrodes and the plurality of the second touch electrodes; aninsulation layer disposed between the black matrix and the plurality offirst touch electrodes, and an overcoat layer between the plurality ofcolor filters and the plurality of first touch electrodes and betweenthe plurality of color filters and the plurality of second touchelectrodes.
 2. The display device of claim 1, wherein the plurality ofthe color filters comprise a first color filter including a first colormaterial, a second color filter including a second color material, and athird color filter including a third color material.
 3. The displaydevice of claim 2, wherein two adjacent color filters of the first tothe third color filters overlap each other in a boundary portiontherebetween.
 4. The display device of claim 2, wherein all of the firstto the third color filters overlap each other in a boundary portiontherebetween.
 5. The display device of claim 1, wherein the lightemitting device layer comprises: a first electrode on the substrate; abank dividing the first electrode; a light emitting layer on the firstelectrode and the bank; and a second electrode on the light emittinglayer, wherein the black matrix overlaps the bank, and the bankcomprises a light absorbing material.
 6. The display device of claim 5,wherein a width of the bank is equal to or greater than a width of theblack matrix.
 7. The display device of claim 5, wherein the colorfilters are disposed to overlap each other in an area overlapping thebank.
 8. The display device of claim 1, wherein the plurality of thefirst touch electrodes and the plurality of the second touch electrodesare disposed on a top of the color filters.
 9. The display device ofclaim 1, wherein the plurality of the first touch electrodes arearranged to overlap a boundary portion between the plurality of thecolor filters in a first direction, and the plurality of the secondtouch electrodes are arranged to overlap a boundary portion between theplurality of the color filters in a second direction which is differentfrom the first direction.
 10. The display device of claim 1, wherein theinsulation layer is disposed on the first touch electrodes and thesecond touch electrodes.
 11. The display device of claim 10, furthercomprising bridge electrodes disposed on a layer different from a layeron which the first and the second touch electrodes are disposed, andconnected to, through contact portions, the first touch electrodesadjacent to each other, wherein the bridge electrodes intersect thesecond touch electrodes.
 12. The display device of claim 11, wherein theblack matrix is disposed on the insulation layer and the bridgeelectrodes.
 13. The display device of claim 1, wherein the color filtersinclude a transparent organic layer.
 14. The display device of claim 13,wherein the transparent organic layer is formed of one or more of acrylresin, epoxy resin, phenolic resin, polyamide resin and polyimide resin.15. The display device of claim 1, wherein the substrate is a plasticfilm or a glass substrate.
 16. The display device of claim 1, furthercomprising a second touch driver, wherein the second touch electrodesextending in a second direction are connected to a second touch line atone end thereof, the second touch line is connected to the second touchdriver through another pad.
 17. The display device of claim 16, whereinthe first touch electrodes receive a driving pulse from the first touchdriver through the first touch line, and the second touch driverreceives charging variation amounts of touch sensors from the secondtouch electrodes, wherein the touch sensors are disposed respectively inintersection portions of the first touch electrodes and the second touchelectrodes.